pro circuit t4 jetting carb

[[_4ex_]]

i got a k&n filtrer and outwear and a prefiltrer, my mecano tell me to put a 146 main jet but i have lost and i think its to smal some body can tell me what main jet sould i put
?

[[_4ex_]]

plz answer rapidly i need to did that right now

[Team Outlaw #34]

I have a K&N filter and a t-4 and I jetted mine to a 158 main and a 42 pilot....hope that helps (I think it also depends on your altitude)

[[_4ex_]]

i'm below 5000 feet

[Team Outlaw #34]

I'm sure i'm below 5000 feet...I think i'm 2000 feet but not sure....

[[_4ex_]]

i read the kit and u just have below 5000 feet or uper 5000feet o care when u jet
that mean i should try a155 dyno jet

[swamprider7]

depending on your altitude, 146 sounds way too small. unless you live in a very high altitude, you should be using a larger main. I would try a 160 and a 165. If you are higher altitude, use the 160. If you are not, try the 165. Do a plug-color check with a 160 first, if it is good(close to cardboard brown in color) keep it. if it is lighter in color, use the 165. If it is dark black, use a smaller jet (155, 158, etc). It all depends on the altitude and the individual bike. It would probably be a good idea to use a slightly larger pilot jet also (40 or 42). hope that helps.

[swamprider7]

if you are using a dynojet kit, the sizes will be different. dynojet jets are rated differently than regular kehin jets. a smaller sized dynojet jet may actually be bigger than a regular kehin jet. 155 sounds like a good size to start with if you are using dynojet jets.

[jb400exxx]

i'm running 170 and 42 at sea level, and it runs great, plug looks perfect! why is the main so high? i tried the 165 and it was still poppin and backfiring like crazy so i tried the 170. the instructions say to use a 170 for my altitude.

[Braff1]

I am running a 155 mj with a 40 pilot jet at about 500 ft elevation.